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ADC082500 Datenblatt(Datasheet) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Teile-Nr. ADC082500
Beschreibung  High Performance, Low Power, 8-Bit, 2.5 GSPS A/D Converter
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Hersteller  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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 5 page
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Pin Descriptions and Equivalent Circuits (Continued)
Pin Functions
Pin No.
Symbol
Equivalent Circuit
Description
10
11
CLK+
CLK-
LVDS Clock input pins for the ADC. The differential clock
signal must be a.c. coupled to these pins. The input signal is
sampled on the falling edge of CLK+. See Section 1.1.2 for a
description of acquiring the input and Section 2.3 for an
overview of the clock inputs.
18
19
V
IN+
V
IN
Analog signal inputs to the ADC. The differential full-scale
input range is 650 mV
P-P when the FSR pin is low, or 870
mV
P-P when the FSR pin is high.
7V
CMO
Common Mode Voltage. The voltage output at this pin is
required to be the common mode input voltage at V
IN+ and
V
IN− when d.c. coupling is used. This pin should be grounded
when a.c. coupling is used at the analog inputs. This pin is
capable of sourcing or sinking 100µA. See Section 2.2.
31
V
BG
Bandgap output voltage capable of 100 µA source/sink.
126
CalRun
Calibration Running indication. This pin is at a logic high
when calibration is running.
32
R
EXT
External bias resistor connection. Nominal value is 3.3k-Ohms
(±0.1%) to ground. See Section 1.1.1.
34
35
Tdiode_P
Tdiode_N
Temperature Diode Positive (Anode) and Negative (Cathode)
for die temperature measurements. See Section 2.6.2.
www.national.com
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